What are the characteristics of distributed fiber optic temperature measurement system?

Distributed Fiber Optic Temperature Measurement Host System (DTS).

1) Uses: tunnel fire monitoring, subway high-speed rail fire monitoring, power cable temperature monitoring, natural gas pipeline leakage monitoring and other fields.

2) Introduction: Distributed optical fiber temperature sensing system (DTS) is a real-time, continuous temperature monitoring system. It has the advantages of real-time, high temperature measurement accuracy, intrinsic safety and no electromagnetic interference.

3) Principle: When light is transmitted in the optical fiber, it interacts with the molecules and impurities in the optical fiber and scatters. The scattering that occurs is Mie scattering, Rayleigh scattering, Brillouin scattering, and Raman scattering, among others.

Where Raman scattering occurs due to the energy exchange that occurs due to the thermal motion of the molecules in the fiber interacting with the photons. Specifically, when a photon is absorbed by the fiber molecules, it is emitted again. If a part of the light energy is converted into heat energy, then a light that is larger than the original wavelength will be emitted, which is called stokes light.

Conversely, if a portion of the heat energy is converted into light energy, then a light smaller than the original wavelength will be emitted, which is called anti-stokes light. Raman scattered light is composed of these two different wavelengths of stokes

The wavelength shift of light and anti-stokes light is determined by the intrinsic properties of the constituent elements of the optical fiber, so the intensity of Raman scattered light is related to temperature to achieve the purpose of temperature measurement. Hunan Guangsheng is a manufacturer specializing in distributed optical fiber temperature measurement hosts, and you can take a look if you want to know more detailed parameters and **.

Distributed optical fiber temperature sensing system is a new type of temperature detection and alarm system, optical fiber sensing temperature principle: the laser emits encoded light pulses along the optical fiber, and the optical fiber interacts with the optical fiber in three quantum superposition states (transmission state, scattering state and absorption state) propagating in the optical fiber, the optical fiber molecules absorb photons and the electrons transition to the virtual state**, emitting new photons, the amount of which is proportional to the temperature of the optical fiber, obtaining backscattered light and filtering out Raman light, decoding and demodulation to obtain any fragment temperature changes, Since the speed of light remains constant, the perceived temperature per meter of fiber can be measured.

The performance parameters of the distributed optical fiber temperature sensor system mainly include the length of the temperature measurement fiber, the stability of the temperature measurement, the temperature measurement accuracy, the spatial resolution and the response time, etc., which have a certain correlation, so that the system has a longer sensing distance, faster response speed, higher temperature measurement accuracy, and higher spatial resolution is the research goal in this field, and the performance indicators of the distributed optical fiber temperature sensor system can be comprehensively improved by studying several key technologies.

Distributed optical fiber temperature measurement manufacturers include: Xi'an Chengtong Electrical Equipment, Shanghai Xunguang Electronic Technology, etc.

Distributed Fiber Optic Temperature Measurement (DTS), also known as Fiber Optic Temperature Measurement, is sensitive to temperature based on the principle of Optical Time Domain Reflection (OTDR) and the Raman scattering effect to achieve temperature monitoring.

The whole system uses optical fiber as the carrier of sensitive information sensing and signal transmission, and Mingyin has the characteristics of continuous temperature measurement, distributed temperature measurement, real-time temperature measurement, anti-electromagnetic interference, intrinsic safety, remote monitoring, high sensitivity, easy installation and long life.

It is widely used in municipal comprehensive pipe gallery, pipeline, mountain acacia car tunnel, cable, petroleum and petrochemical, coal mine and other industries.

Distributed means:

As long as the temperature measurement cable is laid, the temperature can be sensed. The system can be divided into three parts: the main unit, the temperature sensing optical cable, and the software. The temperature sensing optical cable is laid in the monitoring area, the optical cable is connected to the host, and the software is run to monitor the temperature.

(1) The measurement distance is long, which is suitable for remote monitoring. (2) Intrinsic lightning protection. (3) Anti-electromagnetic interference, can work normally in high electromagnetic environment (4) Continuous distributed measurement (6) High sensitivity, high measurement accuracy (7) Long life, low cost, simple system.

The product has been successfully used in various fields such as fire monitoring and alarm, tunnel, cable temperature monitoring, dam leakage and temperature monitoring, heating pipeline and oil and gas pipeline leakage monitoring.

Network cables, optical fiber heat shrinkable tubes, MPO MTP, optical fiber patch cords, optical fiber adapters, optical fiber distribution boxes, optical fiber cables and other related are best used to meet the high quality, so as to ensure our communication transmission, we generally use Phoenix's on the construction site.

1. It is not subject to electromagnetic interference and is corrosion-resistant.

2. Passive real-time monitoring, electrical insulation, good explosion-proof.

3. Small size, light weight, can be winded.

4. High sensitivity and long service life.

5. Long transmission distance and easy maintenance.